not half
Absolutely; I strongly agree. Primarily heard in UK, Australia. A: "Will we go down to the pub for a couple of pints?" B: "Not half!"
not half (something)
A more emphatic way to say "not." Primarily heard in UK. Did you just say that 2+2=5? Geez, you're not half smart, are you?
not half
1 not nearly as. 2 not at all. informal 3 to an extreme degree; very much so. British informalˌnot ˈhalf
(British English, informal) used to emphasize a statement or an opinion: It wasn’t half good (= it was very good).‘Is it hot outside?’ ‘Not half. It’s much too hot for me.’ not half
Not at all: "Fancy housing? Not half likely, ma'am" (Russell Baker).